以近似class-2與class-2 ANSI S1.11 濾波器組設計為基礎之噪音抑制演算處理器研製(I)

南華大學機構典藏系統 > 科技學院 > 資訊工程學系 > 國科會計畫 > Item 987654321/26402

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://nhuir.nhu.edu.tw/handle/987654321/26402

题名:	以近似class-2與class-2 ANSI S1.11 濾波器組設計為基礎之噪音抑制演算處理器研製(I)
其它题名:	An Effective Noise Reduction Algorithm and Its Chip Design Based on Quasi-Class-2 and Class-2 Ansi S1.11 Filterbanks
作者:	賴信志
貢獻者:	南華大學資訊工程學系
日期:	2017
上传时间:	2018-12-06 15:50:15 (UTC+8)
摘要:	本研究提出以頻帶為基礎的噪音抑制演算法，分別結合離散餘弦轉換(Discrete Cosine Transform)與離散傅立葉轉換(Discrete Fourier Transform)為核心架構實現的近似 Class-2、Class-2、以及Class-0 ANSI S1.11 1/3 八度音濾波器組。核心主要之技術為：(1)改善各頻帶間的不匹配現象，亦希望能獲得較低的群延遲與較低的計算複雜度，以及能有效降低聽力圖上的匹配誤差；(2)利用交互相關性為基準的聲源定位演算法，來避免音源能量過強導致判斷上的錯誤；(3)搭配麥克風通道分別計算到的功率頻譜密度分析後進行感知決策。相關之技術研發有助於高規格助聽輔具的設計與發展。 This research mainly focuses on developing frequency-subband based noise reduction algorithm, and it integrates with quasi-class-2, class-2, and class-0 ANSI S1.11 1/3-octave filterbank design based on the DCT and DFT modulations, respectively. The kernel techniques involves: (1) Improving the delay mismatch of each subband, and achieving shorter group delay, lower computational complexity, and lower matching error of the audiogram; (2) Using Cross-correlation to realize sound-source localization and avoiding the problem of more sound-source energy more decision error; (3) Calculating and analyzing the power spectrum density of every microphone, and then accomplishing awareness-computation strategy. This research would bring more design concepts and application on the topic of hearing aids, and the proposed method would be more suitable for high-level applications of hearing aids in the future.
显示于类别:	[資訊工程學系] 國科會計畫

文件中的档案:

没有与此文件相关的档案.

在NHUIR中所有的数据项都受到原著作权保护.

TAIR相关文章

数据加载中.....